If you’re looking to put together your own M16A1, the upper receiver is one of the most important components you need to consider. Without a quality upper receiver, you won’t have a quality rifle. Why Should You Upgrade Your Upper Receiver?
After the "trial" of the 601 the Army requested a number of mods, mainly the addition of the forward assist to the upper receiver, this is the Model 603 which became the XM16E1 in 1964, as more modifications were made & needed they were added during the production runs & resulted in ...
Brownells - AR15: Installing the Delta Ring Assembly and the Barrel Into the Upper Receiver M16A1 Parts Kit #4: Correct M16A1 Furniture Here too is a correct A1 style pistol grip so you can go ahead and toss that A2 grip you got in the lower parts kit. Several different colors are avail...
and included in the sale because it makes it kick harder. The original A1 upper is included as well. I have an A1 regular stock included as well but not photographed
WTS: Excellent condition Colt M16A1. It is currently pared with a SIG 14.5 piston upper. It has the anti-tilt buffer, KNS pin locks and has the Geissele Super Select Fire (SSF) MG trigger. You can easily double or triple tap this set up. This trigger is a select-fire combat trigger ...